柴达木盆地新生代咸化湖盆碳酸盐岩类型及发育特征  

Carbonate types and developmental patterns of Cenozoic saltwater lake basin in Qaidam Basin

作　　者：王艳清 宋光永 刘占国 李森明 魏学斌[2] 夏志远 王鹏[2] 朱超 邢超 WANG Yanqing;SONG Guangyong;LIU Zhanguo;LI Senming;WEI Xuebin;XIA Zhiyuan;WANG Peng;ZHU Chao;XING Chao(PetroChina Hangzhou Research Institute of Geology,Hangzhou 310023,China;Petrochina Qinghai Oilfield Company,Dunhuang 736202,China)

机构地区：[1]中国石油杭州地质研究院,浙江杭州310023 [2]中国石油青海油田公司,甘肃敦煌736202

出　　处：《中国石油大学学报（自然科学版）》2020年第1期1-13,共13页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家“十三五”科技专项(2017ZX05001-002);中国石油科技专项(2016B-0303,2016E-01)。

摘　　要：为了明确柴达木盆地新生代湖相碳酸盐岩类型特征及发育规律,利用野外露头、钻井取芯、显微结构特征等资料,按照碳酸盐岩成因分类法,对碳酸盐岩类型进行划分。结果表明,柴达木盆地新生代发育两种成因类型碳酸盐岩储层,即生物成因和机械-化学复合成因。生物成因碳酸盐岩为藻灰/云岩类;机械-化学复合成因碳酸盐岩为颗粒灰/云岩类和泥晶灰/云岩。柴达木盆地碳酸盐岩发育颗粒滩-灰/云坪、颗粒滩(鲕粒滩)-藻丘、藻席-灰/云坪、颗粒滩-藻丘(席)-灰/云坪4种类型组合样式;灰/云坪储层在柴达木盆地西部地区大面积分布,颗粒滩储层分布于水体较浅、水动力条件相对较强的滨浅湖亚相带中,藻丘(席)分布在滨浅湖亚相内的清水、富氧环境中。In order to examine the characteristics of Cenozoic lacustrine carbonate rocks and their distribution in Qaidam Basin, this study used outcrops, drilling cores and microscope characteristics to classify two major types and three sub-types carbonates according to genesis. The major types are biogenic carbonates, which can be subdivided into two subtypes, algae limestone and bioclastics;and carbonates of mechanical and chemical mixing causes which can be subdivided into two subtypes,grain limestone and mudstone. The developmental characteristics of carbonate rocks are specified, and four combination modes of lacustrine carbonate rocks in Qaidam Basin were established: grainstone beach-dolomatic flat combination pattern, grainstone beach-algae mound combination pattern, algal mat-lime flat combination pattern, and grainstone beach-algae mound/mat-dolomitic flat combination pattern.

关 键 词：柴达木盆地 新生代 咸化湖盆 碳酸盐岩 

分 类 号：TE122.1[石油与天然气工程—油气勘探]